/*
 * This program is free software: you can redistribute it and/or modify it under
 * the terms of the GNU General Public License as published by the Free Software
 * Foundation, either version 3 of the License, or (at your option) any later
 * version.
 * 
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
 * details.
 * 
 * You should have received a copy of the GNU General Public License along with
 * this program. If not, see <http://www.gnu.org/licenses/>.
 */
package com.l2jserver.gameserver.util;

import java.util.Iterator;
import java.util.TreeMap;
import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReentrantReadWriteLock;

import com.l2jserver.gameserver.model.L2Object;

/**
 * @author dishkols
 * @param <T>
 */
public class WorldObjectTree<T extends L2Object> extends L2ObjectMap<T>
{
	private final TreeMap<Integer, T> _objectMap = new TreeMap<>();
	private final ReentrantReadWriteLock _rwl = new ReentrantReadWriteLock();
	private final Lock _r = _rwl.readLock();
	private final Lock _w = _rwl.writeLock();
	
	@Override
	public int size()
	{
		_r.lock();
		try
		{
			return _objectMap.size();
		}
		finally
		{
			_r.unlock();
		}
	}
	
	/**
	 * @see com.l2jserver.gameserver.util.L2ObjectMap#isEmpty()
	 */
	@Override
	public boolean isEmpty()
	{
		_r.lock();
		try
		{
			return _objectMap.isEmpty();
		}
		finally
		{
			_r.unlock();
		}
	}
	
	/**
	 * @see com.l2jserver.gameserver.util.L2ObjectMap#clear()
	 */
	@Override
	public void clear()
	{
		_w.lock();
		try
		{
			_objectMap.clear();
		}
		finally
		{
			_w.unlock();
		}
	}
	
	/**
	 * @see com.l2jserver.gameserver.util.L2ObjectMap#put(L2Object)
	 */
	@Override
	public void put(T obj)
	{
		if (obj != null)
		{
			_w.lock();
			try
			{
				_objectMap.put(obj.getObjectId(), obj);
			}
			finally
			{
				_w.unlock();
			}
		}
	}
	
	/**
	 * @see com.l2jserver.gameserver.util.L2ObjectMap#remove(L2Object)
	 */
	@Override
	public void remove(T obj)
	{
		if (obj != null)
		{
			_w.lock();
			try
			{
				_objectMap.remove(obj.getObjectId());
			}
			finally
			{
				_w.unlock();
			}
		}
	}
	
	/**
	 * @see com.l2jserver.gameserver.util.L2ObjectMap#get(int)
	 */
	@Override
	public T get(int id)
	{
		_r.lock();
		try
		{
			return _objectMap.get(id);
		}
		finally
		{
			_r.unlock();
		}
	}
	
	/**
	 * @see com.l2jserver.gameserver.util.L2ObjectMap#contains(L2Object)
	 */
	@Override
	public boolean contains(T obj)
	{
		if (obj == null)
		{
			return false;
		}
		_r.lock();
		try
		{
			return _objectMap.containsValue(obj);
		}
		finally
		{
			_r.unlock();
		}
	}
	
	/**
	 * @see com.l2jserver.gameserver.util.L2ObjectMap#iterator()
	 */
	@Override
	public Iterator<T> iterator()
	{
		_r.lock();
		try
		{
			return _objectMap.values().iterator();
		}
		finally
		{
			_r.unlock();
		}
	}
}